fix(types): use Partial<ITextGraphicAttribute> for TextIcon style

The TextIcon.style field was typed as ITextAttribute which:
1. Did not include fill and other graphic attributes from IGraphicAttribute
2. Required all properties to be specified (none were optional)

Change to Partial<ITextGraphicAttribute> which extends both
IGraphicAttribute and ITextAttribute with all properties optional,
allowing partial style definitions with fill support.

Closes #3967

Author: xueyuan

packages/vtable/src/ts-types/icon.ts

@@ -1,6 +1,6 @@
 // ****** Icon配置信息，header ，以及列Icon *******9
 
-import type { ITextAttribute } from '@src/vrender';
+import type { ITextAttribute, ITextGraphicAttribute } from '@src/vrender';
 import type { Placement } from './table-engine';
 
 export interface IIconBase {
@@ -79,7 +79,11 @@ export interface IIconBase {
 export interface TextIcon extends IIconBase {
   type: 'text';
   content: string;
-  style?: ITextAttribute;
+  /**
+   * 文字图标的样式，支持 fill、fontSize、underline 等文字及图形属性
+   * 使用 Partial 以允许只配置需要的属性
+   */
+  style?: Partial<ITextGraphicAttribute>;
 }
 export interface ImageIcon extends IIconBase {
   type: 'image';